Rolling-mill.



10-647,087. Patented Apr. lo, |900.

W. BARRETT. RULLINGVMILL. (Application med sptfs, 189s.) (No Model.)

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, NTTED STATES PATENT OFFICE WILLIAM GARRETT, OF CLEVELAND, OHIO, ASSIGNOR OF ONE-HALF TO vJOHN C. CROMWELL, OF SAME PLACE.

ROLLING-MILL.

SPECIFICATIOLI forming part of Letters Patent No. 647,087, dated April 10, 1900.

Application led September 3, 189B. Serial No. 690,186. (No model.)

T0 all whom it may con/cern.'

Be it known that I, WILLIAM GARRETT, of Cleveland, in the county of Cuyahoga and State of Ohio, have invented a new and useful Improvement in Rolling-Mills, of which the following is a specification, reference beinghad to the accompanying drawing, which is a diagrammatic view of my improved ap paratus.

The object of my invention is to provide a rolling-mill compact in construction and adapted to roll most economically such kinds of metal as tin-plate bars, skelp for making tubes, at bars, angles, billets of small crosssection, &c.

It consists in a mill comprising lines of three or more sets of rolls each side by side, one set (a middle set) of one line being connected with the rolls of the corresponding set of another line and the end sets of the several lines being driven at respectively different rates of speed. I am enabled thus to avoid setting the rolls far apart with intermediate feed-rollers, so as to allow the metal to leave one set of rolls before entering the next, and to provide that the metal shall be at once in two or more rolls of the same line. The rolls are successively speeded up, as in continuous mills; but the division of my rolls into groups or lines and the driving of them in the manner above stated obviates the difficulty which would pertain to ordinary continuous mills wherein each successive roll must be speeded up in proportion to the degree of reduction which it effects and wherein the last set of a line of ten or twelve rolls would have to be driven at an unduly-high rate of speed. I thus keep within practical limits the increase in speed required in continuous trains of rolls and can place the rolls so near together' as to avoid the use of different engines for each line or group. The arrangement is such that the blooms rolled in the mill do not interfere in anyway with the rolling of the foltheir use an ingot having been rolled at roughing-rolls (not shown) may be sheared into blooms of proper length before beingintroduced into the rolls of my improved mill. This mill comprises lines of rolls B, C, and D set side by side, the line B having sets of rolls 5, 6, and 7, the line C having set of rolls 8,9, and lO, and the line D having sets of rolls 5', 6', and 7', though each line may have more rolls, if desired.

11 is the driving-engine, and 12212", 12, 12, and l2E are pinions connected therewith and in line with the rolls. The rolls 6 and 6 are connected with pinions 12c and are driven thereby in unison, as are also rolls 9, though in oppositedirections-say at a rate of-fifty-six revolutions per minute, though the speeds here stated are merely illustrative and may be varied. The first set of the line B-namely, the set 5*is driven ata less rate of speed than the setl G-say at forty-two revolutions-per minuteand the last set 7 of the line B is driven at a higher rate than the middle set G say at seventy-tive revolutions per minute. The sets 7 and 7 are connected with the pinions l2a and the set 8 with the pinions 12b, the set 10 being connected with the pinions 12d and the sets 5 and 5 with the pinions 12E. The first set 8 of the line Cis driven at a less rate of speed than the middle set 9-say at forty-v two revolutionswwhich is also less than the speed of the set 7, while the set l0 is driven at agreater speed than the set 9-say at seventy-ve revolutions per minute.

In practice the metal bloom is introduced into the rolls 5 of the line B and thence passes through the rolls 6 and 7, which are driven at successively higher rates of speed, as in a continuous mill, the increase of speed corresponding to the reduction of .the metal at the respective rolls. When the metal emerges from the rolls 7 at the end of the line, it is carried by a lateral transfer-table 13 of ordinary construction to a position in front of the end roll 8 of the line C. It then traverses in succession the rolls S, 9, and 10, whence it may be carried bya transfer-table 14 opposite the rolls 5', and may then pass in succession through the rolls 5', G', and 7'. From the rolls 7 it may be carried by feed-rollers through bull-head rolls 15 and 16, whence it is conveyed to the hot-beds, as in ordinary mill practice.

It will be readily understood that within IOO the scope of theinvention as delined in the l together, and the end rolls oli' the line C being` 1o claim the arrangement and construction of i driven independently of the rolls of the other the rolls may be modified in Various partienlztrs, since What I claim is- A rnill comprising lines of rolls B, C, D, the middle rolls of the three lines being geared together and rotatable at the same speed, the end rolls of thelines Band D beingalso geared two lines; substantially as described.

In testimony whereof I have hereunto set my hand. 4

WILLI-AM GARRETT. Witnesses:

THOMAS W. BAKEWELL, G. I. IIOLDSHIP. 

